Insulation of dynamo-armatures



(Nc Model.)

T. E. MORFORD.. INSULATION 0F DYNAMO ARMATURES.

No. 491,490. Patented Peb. 7, 1893.

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UNITED STATES PATENT OFFICE.

THOMAS E. MOREORD, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF ONE-IIALF TO TI-IE ENAMEL INSULATOR COMPANY, OE ILLINOIS.

INSULATION OF DYNAMO-ARNIATU RES.

SPECIFICATION forming part of Letters Patent No. 491,490, dated February 7, 1893.

Application led January 28, 1891. Serial No. 379,379. (No model.)

To all whom it may concern:

Be it known that I, THoMAs E. MOEEORD, a citizen of the United States, residing at Minneapolis, in the county oi Hennepin and State 5 of Minnesota, have invented a certain new and useful Improvement in Insulation of Dynamo Armatures, of which the following' is a specilication.

My invention relates to means for insulat- Io ing the coils or conductors ot armatures for dynamos; and the object of the invention is to provide an insulating material in an inte- `gral mass in which the conductors are completely and effectively embedded. This obl 5 ject is accomplished in the manner illustrated in the accompanying drawings, in Which- Figure l is an end View, partly sectional, of an armature constructed according to my iniprovement; Fig. 2 is a longitudinal section of zo the same; and Fig. 3 is an enlarged view of a partial transverse section.

In said drawings l designates the shaft and 2 a Wooden, or other, cylinder attached thereto.

z5 3 is the metal core in the form of a fiat ring encircling the cylinder, and et the Wires Wound about the ring in courses parallel to the shaft. These are arranged in segmental divisions in the usual manner, and these segments are con- 3o nected to a commutator (not shown), in the usual manner. The Wires l are not separately Wound with insulating material, as is customary, but are insulated from the core and from one another by an enameling, or like 35 Substance, 5, which maybe made adherent to the core and extend as a continuous mass from the cylinder 2 to the periphery of the armature.

In applying the Wires and the insulation, a coating of the insulating material may be first 4o applied to the core 3 and on it laid the desii-ed convolutions of Wire, and a second coat of enamel then applied; another set of convolutions of the Wire laid and another coating of enamel applied, and so on to the finish. 45 Each layer of the insulating substance may be hardened before the next is applied, or, by using the substance in suitable condition, all of the material may be applied and all the Wires laid before the insulating substance is 5o hardened.

Having described my invention, what I claim is:

l. In a dynamo armature, the combination with the core and the conducting coils, of 5 5 an insulating enamel adherent to the core and embedding the coils, substantially as set` forth.

2. In a dynamo armature, the combination with the core and the conducting coils, of an 6o enamel securing the coils to While insulating them from the core and from one another, substantially as set forth.

3. The method of insulating dynamo armatures, which consists in coating a core with 65 successive layers of an insulating enamel and afterward hardening the insulator, whereby an integral mass embedding the coils and adhering to the core is produced, substantially as set forth.

THOMAS E; MORFORD.

Witnesses:

A. L. JoNEs, P. H. GUNCKEL. 

